ISSN - 10637761, EISSN - 10906509, Journal of Experimental and Theoretical Physics, 2003, vol. 96, p. 789-800
Analysis of e+e- → π+π -π+π- and e+e- → π+π-π0π0 processes in the energy range of √s = 0.98-1.38 GeV in experiments with a spherical neutral detector
The cross sections of the e+e- → π+π-π+π-, e +e- → π+π -π0π0, and e+e- → ωπ → π+π -π0π0 processes, as well as the e +e- → π+π -π0π0 process with subtracted contribution of the ωπ intermediate state, are measured in experiments with a spherical neutral detector on the VEPP-2M collider in the energy range 0.98-1.38 GeV. About 41000 events of the e+e- → π+π-π+π- process and more than 54000 events of the e+e- → π+π-π0π0 process have been selected in experiment. The statistical error in determining the cross section is 2-20%, while the systematic error is 7 and 8%. © 2003 MAIK "Nauka/Interperiodica".